Hi MF,
Based on the screw cap on top of the carby, I'd suggest that's an early G4 or a G3 model carby, so perhaps something to do with the older designs.
As I understand it, Victa sell one Carby part now and they sell it as a whole kit replacement, which is designed to be used on anything with a G3, G4, or LM Carby. That being the case, anything in the current Carby kit should function on any Victa 2-Stroke model with one of those Carby's, from the cheap steel bodied to the 24" slasher.
I have an MSP560 that I purchased new a few years ago, same deal, big tank mounted on the handles, I don't recall ever having an issue stopping and returning and it not starting due to a flood condition though. Everything on it is stock and original as well, so I've never changed the carby or anything.
Cheers,
pau13z
